:root {
  --bg-dark: #0f172a;
  --panel-bg: #1e293b;
  --panel-border: #334155;
  --accent-purple: #8b5cf6;
  --accent-blue: #3b82f6;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-yellow: #f59e0b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.5;
  padding-bottom: 40px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--panel-border);
  margin-bottom: 25px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.brand h1 {
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(90deg, #ffffff, #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge-status {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pulse {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* Tabs */
.nav-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 25px;
  border-bottom: 1px solid var(--panel-border);
  padding-bottom: 10px;
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

/* Cards & Layout */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  background-color: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Grid & Form controls */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 768px) {
  .grid-2 { grid-template-columns: 1fr; }
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--panel-border);
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border 0.2s ease;
}

.form-control:focus {
  border-color: var(--accent-purple);
}

textarea.form-control {
  min-height: 100px;
  resize: vertical;
}

.btn {
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--panel-border);
  color: #fff;
}

.btn-success {
  background: var(--accent-green);
}

.btn-danger {
  background: var(--accent-red);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--panel-border);
  font-size: 14px;
}

th {
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-muted);
  font-weight: 600;
}

tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.status-tag {
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  display: inline-block;
}

.tag-sent { background: rgba(16, 185, 129, 0.2); color: var(--accent-green); }
.tag-bounced, .tag-failed { background: rgba(239, 68, 68, 0.2); color: var(--accent-red); }
.tag-spam { background: rgba(245, 158, 11, 0.2); color: var(--accent-yellow); }

/* Spam Score Gauge */
.spam-meter-box {
  background: var(--bg-dark);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
}

.score-display {
  font-size: 48px;
  font-weight: 800;
  margin: 10px 0;
}

.score-good { color: var(--accent-green); }
.score-warn { color: var(--accent-yellow); }
.score-bad { color: var(--accent-red); }

.code-block {
  background: var(--bg-dark);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 12px 16px;
  font-family: 'Fira Code', 'Courier New', monospace;
  font-size: 13px;
  color: #a78bfa;
  word-break: break-all;
  user-select: all;
  margin-top: 6px;
}